Wrench.



N. s. STALKER.

WRENCH.

APPLICATION FILED JULY 14, 190B.

Patented June 22, 1909.

attomw NEIL S. STALKER, OF DULUTH, MINNESOTA.

WRENCH.

Specification of Letters Patent.

Patented June 22, 1909.

Application filed July 14, 1908. Serial No. 443,449.

To all whom it may concern:

Be it known that I, NEIL S. STALKER, a citizen of the United States,residing at Duluth, in the county of St. Louis and State of Minnesota,have invented new and useful Improvements in WVrenches, of which thefollowing is a specification.

This invention relates to pipe wrenches, and the object of the inventionis to provide a simple, cheap and eflicient device of this characterwhich may be readily adjusted, the grip of which is sure, and which maybe oscillated upon the pipe to take a fresh bite without the necessityof revolving the wrench with the pipe.

With these and other objects in view the invention resides in the novelconstruction and arrangement of parts hereinafter fully described andclaimed.

In the accompanying drawings, Figure 1 is a side elevation of a wrenchconstructed in accordance with the present invention. Fig. 2 is apartial front elevation of the same. Fig. 3 is a transverse sectionalView upon the line 33 of Fig. 1. Fig. 4 is a perspective view of thesliding jaw carrier.

In the accompanying drawings the numeral 1 designates the shank of theimproved wrench. This shank 1 is provided with an offset or head 2, andthe head and a portion of the shank is provided with a central cut awayportion to provide the side members 3 and 4. Secured between the sidemembers provided by the head 2 is a stationary jaw 5. This jaw 5provides a body portion having teeth 6 and adapted to underlie the sidemembers of the head and a tongue portion 7 adapted to fit between theside members and to be secured thereto by suitable retaining elements 8.

The numeral 9 designates the sliding jaw carrier. This jaw carrier 9comprises a central reduced portion 10 adapted to engage between theside members 3 and 4 while the enlarged front and rear faces 11 and 12lie adjacent the front and rear faces of the shank 1 adjacent the sides3 and 4 thereof. The jaw carrier 9 is provided with a forwardlyprojecting tongue 13 having a suit.- able perforation 14 and adapted forengagement with the downwardly projecting arms of the pivoted movablejaw member 15. The side members 3 and 4 of the shank 1 are provided witha series of teeth 16, and the lower portion of the front face 11 of thejaw carrier is also provided with teeth 17 adapted to coact withtheteeth of the shank. The rear face 12 of the jaw carrier is providedwith a flat spring 18 which is adapted to normally bear against the rearface of the shank 1 and to force the teeth 17 into engagement with theteeth 16 of the shank, thus normally locking the jaw carrier 9 upon theshank 1.

It will be noted that the faces 11 and 12 adjacent the front and rearfaces of the jaw 1 are curved in opposite directions, and that by thisarrangement compression upon the spring 18 by the thumb of an operatorwill force the rear face 12 against the outer face of the shank 1 andthus force the teeth 17 away from engagement with the teeth 16 of theshank and allow the carrier jaw to be readily adjusted by the shank.

From the above description it will be seen that I have rovided anextremely simple, cheap and e cient pipe wrench, one which may bereadily adjusted, and one which'may be oscillated upon a pipe to take afresh grip without the necessity of revolving the wrench with the pipe.

Havin thus fully described the invention what is c aimed as new is:

The combination with a shank having a stationary jaw and its upperportion belng bifurcated or spaced to provide a pair of arms, teethprovided upon one of the edges of the arms, a movable head carryingmember mounted between these spaced arms, said member having oppositelydisposed and oppositely curved face portions connected by a central web,the enlarged lower curved faces upon one side of the member adapted toengage with the teeth of the shank, and a flat resilient element adaptedto retain the teeth of the member normally into engagement with theteeth of the shank, said resilient element being connected with theouter face of the jaw carrying member and adapted, when inward pressureis exerted to revolve the member upon the outer smoothed edges of theshank to rotate the jaw carrying member so as to disconnect the teeth ofthe shank and member and allow the jaw carrying member to be slid uponthe shank.

In testimony whereof I afiiX my signature in presence of two witnesses.

NEIL S. STALKER.

I/Vitnesses:

ARGHIBALD L. MGDERMID, FRANK GRAsswELLER.

